Multiple firing x type four cycle internal combustion engine



May 11, 1943. A. G. DAVIS 1 ,59

MULTIPLE FIRING X TYPE FOUR CYCLE INTERNALCOMBUSTLON ENGINE Filed July16, 1940 5 F1) .1. F 3 V I/ 1 I I I. I j I a ,5; I v 10 2 12 l I I I0 1212 12 1 11 I I b: b:

I i I J] A/u/n Gi/berf 17a W's l Patented May 1 l,' 1943 "MULTIPLEFIRING x ma FOUR CYCLE V I INTERNAL COMBUSTION Enema g Alvin Gilbertnavis nm; Bach, 05.11:.

Application my 16, 1940,: Serial No. 345,179

(01. 123-55) Granted under the act of March 3, 1883, as, I

6 Claims.

amended April 30, 1928; 370 O. G. 757) necting rod bearing su Theinvention described herein maybe manufactured and used by or fortheGovernmentfor 'govemmental purposes, without the payment to me of anyroyalty thereon;

This invention relates to the firing order of an X type internalcombustion engine and more I particularly to a crankshaft forcontrollingsaid firing order. A general object of this invention is to.control the firing order of an X type ensine so that the engine ismechanically balanced at any rotative point of the crankshaft.

described; g y

' I have numbered each of the cylinders as 101- lows: in block A'ia, 2a,8a, 4a, in block B- controls the firing order as will be more fully lb,21); 3b, 5b, in block C'ic,,2c, etc. The im- Another object of thisinvention is to provide a crankshaft to control the firing order of myimproved engine. 7

A further object of this invention is to provide an X type enginewherein there are but four power impulses in the two revolutions of thecrankshaft which comprise one cycle of the engine. Another object ofthis invention is to provide an X type engine in whichone fourth of thecylinders are firedsimultaneously, said cylinders being evenlydistributed in oppositely disposed blocks.

1 The various objects and features of my invention will be fullyunderstood from the following detailed description of a preferred form'of the invention, throughout which description reference is made to theaccompanying drawing in which: I

Fig. 1 is a diagrammatic longitudinal section taken on the line l-l ofFig. 3;

Fig. 2 is a similar view taken on the line 2--2 of Fig. 3; I

Fig. 3 is a transverse vertical section taken on the line I-3 of Fig. l;and

Fig. 4 is a diagrammatic perspective view of the crankshaft.

As illustrated in Fig. 3 the preferred form of my engine has four blocksA, B, C. and D arranged about a central crankshaft ill. Each block A, B,C, and D has four cylinders and pistons as illustrated in Figs; 1 and 2.The blocks A, B, C, and D are arranged at right angles *to each otherabout the crankshaft I0. I

The crankshaft III has nin main bearings l2, eight connecting rodbearings ii, and suitably disposed counter-weights l2, as clearly shownin Figs. 1, 2 and 3 of the drawing. Each succeeding connecting rodbearing II is in a plane at in the preceding connecting rod bearing.This positioning of the connecting rod bearings is shown at H in Fig. 4.The planes of the connecting rod bearingsare preferably spiralled in aright hand or clockwise direction as indicated by the arrow I 3 in Fig.4. Each conproved firing order of my engine is as follows: cylinders"la; 3a, 2b, and 4b fire, then cylinders in, 4a, lbyand 3b fire, thencylinders: lc,-3c,"2d, v and 4d fire, then cylinders 20, 40, Id, and 3dfire. This completes one cycle of the engine and two revolutions of thecrankshaft. I

In the light of the preceding 'firing'orde'r, it will be seen, referencebeing had to Figs. 1 and 2 of .the'drawing, that cylinders 2a and 4aare,

ready to fire and la and 3a to, exhaust; cylinders lb and 3barereadytofireanid 2band4b toexhaust; cylinders 20 audio are ready forintake and lo and 30 for compression; cylinders id and are ready forintake-and 2d and 4d for compression. g f

Thus it'will be seen that four cylinders of the sixteencylinderengineillustrated are fired at one time and of stliese four twojare in oneblock and the other two are in the block diametrically opposite or fromthe first mentioned block. Where the total number of cylinders is eightor thirty-two there would still be onefourth of the cylinders firlng atone time. Onehalf of which would be in one'block and the other half inthe block diametrically opposite.

, From the preceding disclosure it is readily seen that the powerforcesof my improved engine are always at 180 to each other andtherefore the engine is mechanically balanced at all times. Thisrelationship of the power forces resuits in a smoother running. morepowerful engine than any heretofore designed.

Having described onlytypical preferred forms and applications of myinvention, I'do not wish to be limited or restricted to the specificdetails herein set forth, but wish to reserve to myself any variationsor modification that may appear to those skilled in the art or'fallscope of the following claims.

Having described my invention, I claim: 1. An internal combustion enginecomprising an eight-throwcrank shaft having adjacent throws disposed inplanes normal to one another, and

having each pair of throws lying in the same plane projecting inopposite directions, four rows of radially disposed, equally spaced,regularly arranged cylinders, each cylinder provided with y I rts twoconnectingrods I which are in oppositely disposed blocks Aand' B, A or Cand'D.-"'Ihisarrangement provides for and within the faslidable'pistonrthe pistons-in each pair 'jecting'in opposite directionsfrom the crank- 7 mg laterally from the'crankshaf-t and: each pair.

tween cylindersof opposing rowsihereonpa 3. An internal combustionengine comprising 7 havingadjacent V,

of opposing cylinders being connected to one of each and ignition means1015,8801! of said cylinders, whereby to eifect simultaneous firing ofonefourth of the cylinders at 180 intervals.

-, of said crank throws, and valved fuel admission 2. An internalcombustion engine-comprising aneight-throwcrank shafthavlng adjacentthrows disposed in'planes normal to one another and each pair ofthrowsly n in the same plane Dr shaft, each pair of throws in one planeextend.-

oi throws in the remaining planeextendingve tically fro nthe crankshaft,four rows of radially;

disposed, equa1ly spaced,;regular1y arranged cyl:

inders, each cylinder'pmvided with a slidable I piston, the piston; ineach pair of opposing cyl-.

lnders being connected to one of each of said 1 crank throws, and valvedfuel admission and isnition means for each said cylinders; i'whereby:

' 7 stroke,the power impulses fromsaidone-fourth oi the firing cylindersbeing equally-divided be- I andiznition means for'the' respectivecylinders,

e sw di l fourth of the cylinders simultaneously at inter- I vals of180. a

an eight-throw crankshaft V throws disposed in planes normal to one an.-other, the throws of. each pair lyimr'in thesame plane projecting in blpositedirections from the crankshaft. balancing-weights in connectionwith ,eachthrow, four rows of radially disposed, I equally spaced,Rflflarly arranged cylinders,

' each provided with aslidable piston, the pistons f in each pair ofopposing; cylinders being connected'to one of each of said crank throws,and

, valved fuel admissionand ignition'meansfor each of said cylinderswherebyto'obtain simultaneou firin: of one-fourth of the cylinders at.intervalsof 180. I j

4. An internal combustion enfline comprising I a multi-throw'balancedcrankshaft havin': Bd-Y riacent throws disposed in planes normal :to oneanother and each pair of throws lying in to 'eflect simultaneous firingat 180? intervals or one-fourth of the cylinders in a. single powerextending: yertically from eachj'ofsaid crank throws, and valved fueladmission andignitlon mean for each of said cyl- "lndem whereby -r toeii'ect simultaneous firing of one-fourth; ofxthe cylinders at intervalsof 180,

--hepower impulses from said one-fourth of the nring cylinders beingequally divided between cylinder of opposing'rows thereof.-

I 5."An 1 internal combustion enginev eom'prising' i 'ddeight-throwi.crankshaft, each throw of said crankshaft beina' 'di'sposed ina planeismed 9 -'from that of the r aid: throws spiralling around the crankshaftfrom the i 'iltial;,,to the terminal throw thereof,

preceding throw,"-the' p ne8 of fourrowsof radially disposed, equallyspaced,

'- regularly arranged cylinders, each cylinder providedywithaslidablepiston, and fuel-admission such a' manner as to the one- 6. An internal'combustion .;eng ine comprising d an. eight-tlmow crankshaft each-throw of said 1 crankshaft being disposedin a plane spaced 90 from thatof thepreceding throw, the planes of said throws, spiralling around the,crankshaft from .the initial to the terminal throw thereof, four. rowsof radially disposed, equally spaced, regularly arranged cylinders, eachcylinder provided with a slidable piston, and fuel admission andignitionmeans for the respective cylinders,

all disposed in such a manner as to fir onei'ourth of the cylinderssimultaneously at inter- Vale of 180 with the power impulses equallydistributed between'the cylinders of opposing rows thereof. I i Y ALVINGILBERT DAVIS.

I equally spaced resulajrly arranged cylinders, each cylinder provided

